So from what I gather based on your post as well as the others' responses, I can't buy lenses that would work 100% on FF and crop sensor cameras?

Thanks!

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CalvinThere's always a catch. Life is a catch. You better catch it while you can.

All Sony Lenses except the E-mount lenses and all Minolta Maxxum lenses work on all Sony bodies so far. On a full frame camera the crop lenses (designated as DT) will work but the camera will switch itself to crop mode. All the lenses on APS-C bodies will be cropped x 1.5 whether for full frame or only for crop cameras.